Pumping power



Aug'. 31, 1937. V R, E, LEQNARD 2,091,287

PUMPING POWER Filed Sept. 4, 1934 2 Sheets-Sheetv 1 Aug-31, 1937. RELEQNARD 2,091,287

PUMPING POWER Filed Sept. 4, 1934 2 Sheets-Sheet 2 35/ 52 ATTORNEY.

Patented Aug. 31, 1937 UNITED STATES fwATENT oFFicE 7 Claims.

This invention is a pumping power, particularly useful for operating deep well reciprocating pumps, but may be used for other purposes.

The general object of the invention is to provide a simple, practical and efficient pumping power for effecting a long and slow stroke of the sucker rod oi a deep well reciprocating pump.

A more particular object is to provide a pumping power of the character stated including a y drive pinion, a double and continuous rack in mesh with said pinion, whereby said rack is reciprocated, and means for enabling` said rack to reciprocate the sucker rod of a deep well pump.

Another object is to provide a pumping power including a drive pinion and a rack as above stated, a pull wheel or drum and a pull line extending ovei` and secured to said wheel o-r drumand means whereby said pull wheel or drum is A rotated first in one direction and then in the other by said rack, for enabling said pull line, when connected to the sucker rod of a deep well pump, to reciprocate said rod.

Another' object is to provide a power comprising a drive pinion, and a. double and continuous segmental gear driven by said pinion first in one direction, and then in the other direction.

A further object is to provide a pumping power including a drive pinion and a double and continuous rack in mesh with said pinion, whereby said rack is reciprocated, and means connecting said rack directly to the sucker rod of a deep Well pump for enabling said rack to reciprocate said rod.

Other objects and advantages will appear hereinafter.

The invention is illustrated in the annexed drawings which form a part of this specication and in which:

Fig. l is a transverse vertical section of one form of my invention taken on line I-I of Fig. 2.

Fig. 2 is a plan view of the form of my invention shown in Fig. l.

Fig. 3 is a vertical longitudinal section. taken on line .iS- 3 of Fig. 2.

Fig. 4 is a transverse vertical section taken on line 4 4 of Fig. 3, illustrating the bearing wheel for the pinion drive shaft, and other features.

Fig. 5 is a transverse vertical section of another form of my invention taken on` line 5 5 of Fig. 6.

i Fig. 6 is a vertical longitudinal section of the form of my invention shown in Fig. 5 taken on '55 line 6-6 of said gure.

Fig. 7 is a horizontal section taken on line 'I-l of Fig. 6.

Fig. 8 is a section taken on line 8-8 of Fig. 1 with the drive pinion in mesh with the left end of the rack and the drive pinion rollers engaging the left end arcuate pinion guide.

Fig. 9 is` avlongitudinal section of the drive pinion and guide rollers shown in Figs. 5 and 6, the pinion drive shaft being shown in elevation.

Fig..10 is a front elevation of another form of l0 my invention.

VCorresponding parts are designated by the same reference characters in all the figures of the drawings.

Referring to Figs. 1 to 4 inclusive, I designates l5 a rack bar formed with a double continuous rack 2 and with a single rack 3, the rack 2 extending along the upper and lower sides and around the ends of said bar, and the rack 3 extending along the inner sideof said bar. The bar I is mounted 20 to reciprocate in a slideway 4 by means of cross heads 5 and 6 formed integral with the ends respectively of the bar at 7 and B, said slideway comprising a lower slide rail 9 and an upper slide rail II), and said cross heads being formed with .lower shoes II and upper shoes` I2 which slidably .engage the upper side of the lower slide rail 9 and the lower side of the upper slide rail Ii! respectively. The cross heads 5 and 6 are formed with arcuate pinion guides` I3 and I4 spaced from and extending around the ends respectively of the rack 2. The slide-way 4 is mounted on a base I5 upon which` is secured the lower slide rail 9. The slideway 4 includes end uprights IB and I1 and intermediate uprights I8 and I9, said 35 i end uprights connecting the corresponding ends respectively of the slide rails 9 and I0 and supporting the ends respectively of the slide rails I0 and said intermediate uprights I8 and I9 connectingthe slide rails 9 and I9 intermediate their -ends aridsupporting the intermediate portion of the upper slide rail IB; The intermediate uprights IB-and I9 are positioned to engage the front side of the rack bar I for guiding said bar and preventing it from being displaced outwardly 45 from the slideway 4. The single rack 3 on the inner side of the rack bar I meshes with a gear wheel 20 keyed on a vertical driven shaft 2l journaled at its lower end in a bearing 22 on the base I5 and journaled near its upper end in a bearing 23 on a spider 24 upstanding from said base I, two of the arms 25 and 26 of said spider being connected to said intermediate uprights I8 and I9 respectively for reinforcing the same.

On the upper end of the driven Lshaft 2l is 55 keyed a pull wheel or drum 21, the periphery of which being flanged to form a spiral groove 28 to receive a pull line cable 29, which extends spirally around the periphery of said wheel in said groove and is secured at one end to said wheel as at 30, the other end (not shown) of said cable being connected to an element to be reciprocated, such as the sucker rod of a deep well pump. i

A drive pinion 3|, in mesh with the double continuous rack 2, is secured onA one end of a pinion drive shaft 32 which extends' eccentrically through and is journaled in a bearing wheel 33 rotatably mounted in a bearing 34 supported on the base l5 in front of the rack bar I, said bearing wheel being formed with an external annular flange 35 which is turnably tted in an internal groove 35 in said bearing 34 to prevent lateral displacement of said bearing wheel with relation to said bearing. Disk rollers 31 and 38 are loosely fitted on the pinion drive shaft 32 adjacent the side faces of the pinion 3|, the roller 31 resting between the innei` side of the bearing wheel 33 and the adjoining side of said pinion and the roller 3i resting between the opposite side of said pinion and a head 39 on the inner end of the pinion drive shaft 32. The disk rollers 31 and 33 engage the rack bar I at the ends of the teeth of the rack 2 and maintain the teeth of the drive pinion 3| and the teeth of the rack 2 in proper meshing relation, so that the pinion and rack will not jam under heavy load, said disks also being positioned to engage the arcuate guides i3 and lil and guide the pinion 3| around the ends of the rack and maintain the teeth of the pinion in mesh with the teeth of the rack, while the pinion travels around the ends of the rack respectively. A roller clutch 40 is provided in the 1oearing wheel 33 for engaging the inner surface of the bearing 34 to prevent the wheel 4o from turning clockwise, but allowing the wheel to turn counterclockwise in said bearing for the purpose hereinafter described. The outer end of the pinion shaft 32 is connected by a universal joint ll to one end of a floating shaft 42 which is connected at its other end by a universal joint 63 to one end of a drive shaft 44 journaled in bearings 45 in a gear housing 46 mounted on the base l5. A worm gear 41 is secured on said drive shaft 4d in mesh with a worm 48 in the lower part of the gear housing 4S, which worm is secured on a worm shaft 49 journaled in and eX- tending through a bearing 50 in the lower part of said gear housing. A pulley 5I is secured on the outer end of the worm shaft 49 to which power may be applied.

The operation of my invention as above described, is as follows:

Power being applied to the pulley 5| and said pulley rotated, the drive pinion 3| is rotated clockwise through the medium of the Worm shaft |39, worm 33, worm gear 41, drive shaft 44, floating shaft 52, and pinion drive shaft 32, whereupon the drive pinion 3|, meshing with the upper side of the rack 2, causes said rack and rack bar I to travel to the left (Figs. l and 2) and the single rack 3, meshing with the gear 2U, rotates said gear, driven shaft 2| and pull wheel or drum 21 in a clockwise direction, which winds the cable 23 on said pull wheel or drum 21 until the drive pinion 3l reaches the right end of the rack 2, during which operation the disk rollers 31 and 38 engage the upper side of the rack bar I and maintain the drive pinion in proper meshing relation with the upper side of the rack 2. As the cable 29 is wound on the drum 21, the sucker aosanvy rod of a deep well pump, to which rod said cable is connected, is lifted slowly for a distance equal to the length of that portion of the cable which is wound on said drum. As the drive pinion 3| reaches the right end of the rack 2 the rollers 31 and 38 engage the arcuate guides III and the end of the rack bar I, and said pinion is thereby guided downwardly around the right end of the rack; and since the roller clutch 40 prevents rotation of the bearing wheel 33 clockwise, the movement of the pinion 3| around the right end of the rack 2 causes said bearing wheel to rotate counterclockwise and give the rack bar I an additional movement to the left equal to the distance between the center of the bearing wheel 33 and the center of the drive pinion 3|, which additional movement of the rack bar I gives the pull wheel or drum 21, through the rack 3, gear 2G, and driven shaft 2|, a corresponding additional clockwise movement, and said additional movement of the pull wheel or drum 21 winds an additional length of the cable 29 on said drum and lifts the sucker rod to which said cable is connected a corresponding additional distance, thus increasing the length of the upward stroke of said sucker rod. As the drive pinion 3| travels around the right end of the rack 2, the bearing wheel 33 is rotated 180 counterclockwise and said pinion then engages the lower side of the rack 2 and causes said rack and the rack bar I to travel to the right, until said pinion reaches the left end of said bar, the disk rollers 31 and 38 engaging the under side of the rack bar I and maintaining the pinion 3| in proper mesh with said under side of said rack, during which operations, the pull wheel or drum 21, through the medium of the rack 3, gear 2E] and driven shaft 2l, is rotated counterclockwise, and the cable 29 is unwound from said drum, and the sucker rod, to which said cable is connected, is allowed to descend a distance equal to the length of the cable which is unwound from said drum. As the drive pinion reaches the left end of the rack 2,

the pinion rollers 31 and 3S engage the arcuate guide I3 and the end of the rack bar I, and said pinion is thereby guided upwardly around the left end of the rack, during which operation the roller clutch 40 prevents the bearing wheel 33 from rotating clockwise, but allows said wheel to rotate counterclockwise, which gives the rack bar I an additional movement to the right equal to the distance between the center of the bearing wheel 33 and the center of the drive pinion 3|, whereupon the pull wheel or drum 21, through the rack 3, gear 2|) and driven shaft 2|, is given a corresponding additional counterclockwise movement, which movement of the drum 21 unwinds therefrom an additional length of the cable 29 and allows the sucker rod, which is connected to said cable, to descend a corresponding additional distance, thus increasing the downward stroke of the sucker rod. As the drive pinion 3| travels around the left end of the rack 2 the bearing wheel 33 is rotated 180 counterclockwise and said pinion then engages the teeth on the upper side of the rack at the left end thereof, and the above described operations are then repeated, giving the sucker rod a slow stroke of maximum length.

In the form of my invention illustrated in Figs. 5 to 7 and 9 inclusive, a vertical slideway E!) is mounted in a base 6| above the upper end of the casing 62 of an oil well, and a slide |53 is mounted to slide in said slideway, which slide is connected to the upper end of the sucker rod 64 of said oil `well, and to the upper end of a .vertical rack bar 65, the lower end of said rack bar being connected to a slide 69 also mounted toslidein said slideway. The upper .end of said sucker rod 64 extends through a lug..61 projecting from the slide 63 and nuts 68 and 69, in'threaded engagement with said rod, engagethe lower and upper sides respectively of said lug for detachably connecting the upper end of said sucker rod. to the slide 63. A double continuous rack 18 extends along opposite sides of the rack bar 65 and around the lower and upper ends of said bar, which rack meshes. with a drive pinion 1| keyed on one end of a pinion drive shaft 12 journaled in a bearing wheel 13, which bearing wheel is journaled in a bearing 14 mounted on the base 6|. The drive pinion shaft 12 is reduced from its inner end for a portion of its length as at 15, providing a shoulder 16 between said reduced portion and the remainder of said shaft, and the drive pinion 1| is keyed byla key 11 on said reduced portion of saidshaft, while a pair of disk rollers 18 and 19 are turnably mounted on said reduced shaft portion at the outer and inner sides respectively of said drive pinion 1|, the roller 18 fitting between the outer side of said pinion and the shoulder 16 and the inner end of the reduced portion 15 of the pinion drive shaft 12 being flanged over the inner side of the roller 19, as at 80, for holding the roller 18, drive pinion 1| and roller 19 in operative position on said reduced portion 15 of the pinion drive shaft, so that said rollers 18 and 19 willengagethe sides and ends of the rack bar 65 at opposite sides of the drive pinion 1| while said pinion meshes with the rack 1B. The bearing 14 is formed with internal annular flanges 8| and 82 at opposite sides respectively of the bearing wheel 13 for preventing displacement of said bearing wheel from said bearing. A roller clutch 83 is provided in the periphery of the bearing wheel 13 for clutching said bearing wheel with the bearing 14, to prevent turning of said bearing Wheel counterclockwise, but allowing said bearing wheel to turn clockwise in said bearing.

Power is applied through a transmission mechanism 84, which comprises a worm shaft 85, a worm 86 secured on said worm shaft, a worm gear 81 in mesh with said worm, a drive shaft 88 on which said worm gear is secured, and a floating shaft 89 connected at one end by a universal joint 90 to one end of said drive shaft 88, and connected at its other end by a universal joint 9| to the outer end of the pinion drive shaft 12, there being a pulley 92 secured on the outer end of the worm shaft to which power is applied to drive said worm shaft. The worm shaft 85 and the drive shaft 88 are journaled in a gear housing 93 which encloses the worm 86 and the worm gear 81.

The operation of my invention shown in Figs. 5 to '1 and 9 inclusive is as follows:

Power being applied to the pulley 92 to rotate the same, the drive pinion 1| is rotated counterclockwise, through the medium of the Worm shaft 85, worm 86, worm gear 81, drive shaft 88, universal joint 90, floating shaft 89, universal joint 9| and drive pinion shaft 12, whereupon the drive pinion 1| meshing with the rack 10 at the left side of the rack bar 65 causes said bar and the sucker rod 64 to move upwardly, until the lower end of said bar approaches said drive pinion, and as said pinion travels around the lower end of said rack, the roller clutch 83 prevents rotation of the bearing wheel 13 counterclockwise, but allows said wheel to rotate clockwise, which causes said drive `pinion 1| .to movethe rack bar 65' and sucker rod 64 upwardly an additional distance equal to the -distance between the center of the bearing wheel 13 and the 'pinion shaft 1.2, thus increasing the upvward stroke ,of the rack bar 65 and sucker rod 64. When the drive pinion 1| has traveled around the lower end of the rack 10 it meshes with the teeth on the .right sideof the rack bar 65 and causes said bar and the sucker rod 64 to descend, until the upper end of the rack reaches said drive pinion, and as said drive pinion travels around the upper end of the rack 10, the roller clutch 83 prevents rotation-of the bearing Wheel 13 counterclockwise, but allows said .wheel to rotate clockwise, which causes the drive pinion 1| to move the rack bar 65 and sucker rod 64 downwardly an additional distance equal to the distance between the center of the bearing wheel 13 and the center of the pinion shaft 12, thus increasing the downward stroke of the sucker rod 64. When the drive pinion 1| has traveled around the upper end of the rack 18 it again meshes with the rack at the left side of the rack bar 65 `and the above described operations are repeated.

In the form of my invention shown in Fig. l0 a double continuous segmental gear |08 meshes with a 'drive pinion |9| secured on a drive shaft |62 journaled in a bearing Wheel |03, which bearing wheel is journaled in a bearing |84. The segmental gear |00 comprises a hub |95, spokes |65 radiating from said hub, and a segmental annulus |81 secured on the ends of said spokes, said annulus being formed with gear teeth |0I on its inner and outer sides and around its ends which mesh with the teeth of said drive pinion. Arcuate guides |08 and |09 are secured on spokes |06 of the segmental gear |00 and extend around the ends respectively of said gear for guiding the pinion around said ends for reversing the movement of said gear. The hub |05 of the segmental gear 08 is secured on a driven shaft l0 j ournaled in a bearing A roller clutch ||2 is provided between the bearing wheel |03 and the bearing |04 for preventing rotation of said wheel in one direction while allowing said Wheel to rotate in the other direction. Power may be applied to rotate the pinion drive shaft through a transmission such as the transmission 84 shown in Fig. 6. Rollers ||3 are journaled on the pinion drive shaft |02 for engaging the arcuate guides |98 and 89 `for guiding the pinion around the ends of the segmental gear |00. Power may be applied from the driven shaft |0 in any suitable manner.

I claim as my invention:

1. In combination, a double continuous rack, a pinion in mesh with said rack, means for enabling said pinion to travel around the ends of said rack from one side thereof to the other for reciprocating said rack and means for shifting said pinion as it travels around the ends of said rack for increasing the movement of said rack.

2. In combination, a double continuous rack, a bearing Wheel, a pinion shaft journaled eccentrically in said bearing wheel, means for rotating said pinion shaft, a pinion on said pinion shaft in mesh with said rack, and means for preventing rotation of said bearing wheel in one direction, but allowing rotation of said wheel in the other direction to enable said pinion to travel around the ends of said rack and increase the movement of said rack.

3. In combination, a double continuous rack, a bearing wheel, a pinion shaft journaled eccentrically in said bearing wheel, a pinion on said pinion shaft in mesh with said rack, a drive shaft, means whereby said drive shaft is rotated, a floating shaft universally connected at its ends respectively to said drive shaft and said pinion shaft, and means for preventing rotation of said bearing Wheel in one direction, but allowing rotation thereof in the other direction to enable said pinion to travel around the ends of said rack and increase the movement of said rack.

4. In combination, a rack bar, a rack extending along opposite sides and around the ends of said rack bar, means for mounting said rack bar to reciprocate vertically over a deep well, means connecting said rack bar to the sucker rod of a pump in said well, a pinion in mesh with said rack, and means for enabling said pinion to travel around the ends of said rack'` from one side thereof to the other for reversing the movement of said rack and said sucker rod and means for shifting said pinion as it travels around the ends of said rack and bar for increasing the movement of said rack bar and sucker rod.

5, In combination, a pinion for driving racks or segmental gears, a pinion shaft, a bearing Wheel in which said pinion shaft is eccentrically journaled, means for preventing rotation of said bearing Wheel in the direction of travel of said pinion, but allowing rotation thereof in the opposite direction, and means for rotating said pinion shaft and pinion.

6. In combination, a rack bar, a rack extending along opposite sides and around the ends of said rack bar, a second rack extending along a third side of said rack bar, means for reciprocatively mounting said rack bar, a pinion in mesh with said rst rack, means for enabling said pinion to travel. around the ends of said first rack from one side thereof to the other for reciprocating said rack, a gear-Wheel shaft, a gear Wheel secured on said gear-Wheel shaft in mesh with said second rack, a drum secured on said gear- Wheel shaft, and a cable connected at one end to said drum and Wound thereon.

7. In combination, a rack bar, a rack extending along opposite sides and around the ends of said rack bar, a second rack extending along a third side of said rack bar, means for reciprocatively mounting said rack bar, a pinion in mesh with said first rack, means for enabling said pinion to travel around the ends of said first rack from one side thereof to the other for reciprocating said rack, means for shifting said pinion as it travels around the ends of said first rack to increase the movement of said rack, a gear-wheel shaft, a gear wheel on said gear-Wheel shaft in mesh with said second rack, a drum secured on said gear-Wheel shaft, and a cable connected at one end to said drum and Wound thereon.

ROY E. LEONARD. 

